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Acquired Intangible Assets (Tables) | 12 Months Ended
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Sep. 30, 2021
Acquired Intangible Assets |
Schedule of Finite-Lived Intangible Assets | As of September 30, 2021 and 2020, intangible assets are as follows:
​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | September 30, 2021 | ​ | September 30, 2020
​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Weighted | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Average | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Average | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Remaining | ​ | ​ | ​ | ​ | ​ | ​ | ​ | Remaining | ​ | ​ | ​ | ​ | ​ | ​
​ | ​ | Amortization | ​ | ​ | ​ | Accumulated | ​ | ​ | ​ | Amortization | ​ | ​ | ​ | Accumulated | ​ | ​
​ |  | Period |  | Gross |  | Amortization |  | Net |  | Period |  | Gross |  | Amortization |  | Net
​ | ​ | (Amounts in thousands)
Customer list |  | 3 years | ​ | $ | 90 | ​ | $ | 71 | ​ | $ | 19 |  | 4 years | ​ | $ | 90 | ​ | $ | 62 | ​ | $ | 28
Schedule of Finite-Lived Intangible Assets, Future Amortization Expense | Annual amortization expense related to intangible assets for each of the following successive fiscal years is as follows:
​ | ​ | ​ | ​
Fiscal year ending September 30: |  | (Amounts in thousands)
2022 |  | ​ | 9
2023 |  | ​ | 9
2024 |  | ​ | 1
Total | ​ | $ | 19

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